Carlos Henriquez, a first-term state representative from Dorchester, is accused of choking and repeatedly punching a 23-year-old college student, who told authorities she escaped early Sunday only by jumping out of a moving car in the Fenway.

The new details of the incident that led to the arrest of Henriquez were heard Monday in Roxbury Municipal Court, where the lawmaker pleaded not guilty to all charges and was ­released on $1,000 cash bail.

Accompanied by about eight supporters, Henriquez, 35, wore a black suit and stood expressionless with his hands clasped in front of him during the 10-minute court hearing before Judge ­Kenneth Fiandaca.

Henriquez did not speak during the hearing, but his lawyer, Stephanie Soriano-­Mills, said he will resolve the charges in court.

In a statement issued Monday night, Henriquez said: “I have been accused of some serious charges; these allegations are completely untrue. I was raised by a strong mother and also raised with a younger sister, both of whom I respect and love deeply. My father, Julio ­Henriquez, who recently passed, was a track coach and mentor to hundreds of young women from this community, and I have dedicated myself to protecting women, not abusing or assaulting them. Putting my hands on a woman is contradictory to my upbringing and my own morals.”

In a Boston police report filed in court, Katherine Gonzalves was quoted as telling Boston ­police that she and Henriquez were friends and that they had embarked on an intimate relationship within the past month.

Gonzalves told police that Henriquez picked her up at her mother’s home in Arlington around 2 a.m., telling her that he wanted to discuss their relationship.

She said the conversation turned tense after they pulled away in the car, according to the police report. Gonzalves said she then asked to be taken home, prompting ­Henriquez to ask, “I came here all the way for what?”

Henriquez spent the next two hours driving around ­Boston, includ­ing along ­Storrow Drive and into the Fenway neighborhood, assault­ing her and refusing to let her out of the vehicle, she told authorities.

“Ms. Gonzalves stated that Mr. Henriquez had punched her with a closed fist repeatedly and ­strangled [sic] her while she was in his motor ­vehicle,’’ said the police report. “Ms. ­Gonzalves stated that ­every time she attempted to jump out of the car, the suspect grabbed her wrists to prevent her from jumping out of the motor vehicle.’’

During the time in the car, police said, Henriquez seized her cellphone and removed the battery and SIM card.

As the car slowed on ­Forsyth Street, near Northeastern University, Gonzalves told police she jumped out. “Officers ­observed scuff marks on Ms. Gonzalves’ right shin and multiple bruises on her arms and wrists,’’ police wrote.

She declined medical attention.

Henriquez was arrested around 4:30 a.m. Sunday near Forsyth Street on charges of ­domestic assault and battery and domestic kidnapping.

He was released on $1,000 cash bail, the same bail he posted following his arrest.

“As both a community activist prior to getting elected and as an elected official, I have spoken with hundreds of youth and adults about the problem of violence against women,” Henriquez said in his statement Monday night.

“I have worked tirelessly with multiple agencies and organ­izations who champion against the issue of domestic violence,’’ he said.

“It is a mission I am committed to in my personal and public life. Currently, this matter is in the hands of the court, and I am confident that when this process has run its course I will be vindicated of all charges.”

Henriquez represents the Fifth Suffolk District, which ­includes parts of Dorchester and Roxbury.

Among those showing support for Henriquez in court Monday were Darnell ­Williams of the Urban League of Eastern Massachusetts and John ­Barros, a member of the Boston School Committee and executive director of the ­Dudley Street Neighborhood Initiative. Henriquez was president of the Initiative’s board of directors from 2007-2011.

Barros said he has known Henriquez since childhood.

“These kinds of charges are in polar opposite to the man I know,” Barros said by
phone. “These are serious ­allegations and should be taken as such, but I’ve never seen ­Carlos act violently.”

Maureen Gallagher — policy director for Jane Doe Inc., a statewide advocacy agency that fights against domestic violence — said such violence may not be apparent to friends and relatives of the victim or perpetrator. “Domestic violence occurs daily in our communities and infrequently makes headlines as it does when a public official is ­involved,” Gallagher said.

Peter Schworm of the Globe staff contributed to this report. Brian Ballou can be reached at bballou@globe.com. Follow him on Twitter @GlobeBallou.